"Urethral blockage" refers to a condition where something is blocking or stopping the flow of urine through the tube called the urethra, which carries urine from the bladder out of the body. Full definition
Prevention of urethral blockage depends on the cause of the blockage. (acvs.org)
Male cats are more prone to urethral blockage due to their narrow urethras which is the tube that carries the urine from the bladder. (vrc-nova.com)
Some of the other causes can be urinary or bladder stones, bacterial infections, tumors, anatomical abnormalities or urethral blockages caused by crystals or stones. (catcareonline.com)